Update dependencies from https://github.com/dotnet/winforms build 20190712.4 (#1243)

- Microsoft.Private.Winforms - 4.8.0-preview8.19362.4

Dependency coherency updates

- Microsoft.NETCore.App - 3.0.0-preview8-27912-03 (parent: Microsoft.Private.Winforms)
- Microsoft.NETCore.App - 3.0.0-preview8-27912-03 (parent: Microsoft.Private.Winforms)
- Microsoft.NETCore.App - 3.0.0-preview8-27912-03 (parent: Microsoft.Private.Winforms)
- Microsoft.NETCore.App - 3.0.0-preview8-27912-03 (parent: Microsoft.Private.Winforms)
- Microsoft.NETCore.App - 3.0.0-preview8-27912-03 (parent: Microsoft.Private.Winforms)
- Microsoft.NETCore.App - 3.0.0-preview8-27912-03 (parent: Microsoft.Private.Winforms)
- Microsoft.NETCore.App - 3.0.0-preview8-27912-03 (parent: Microsoft.Private.Winforms)
- Microsoft.NETCore.App - 3.0.0-preview8-27912-03 (parent: Microsoft.Private.Winforms)
- Microsoft.NETCore.App - 3.0.0-preview8-27912-03 (parent: Microsoft.Private.Winforms)
- Microsoft.NETCore.App - 3.0.0-preview8-27912-03 (parent: Microsoft.Private.Winforms)
- Microsoft.NETCore.App - 3.0.0-preview8-27912-03 (parent: Microsoft.Private.Winforms)
- Microsoft.NETCore.App - 3.0.0-preview8-27912-03 (parent: Microsoft.Private.Winforms)
- Microsoft.NETCore.App - 3.0.0-preview8-27912-03 (parent: Microsoft.Private.Winforms)
- Microsoft.NETCore.App - 3.0.0-preview8-27912-03 (parent: Microsoft.Private.Winforms)
- Microsoft.NETCore.App - 3.0.0-preview8-27912-03 (parent: Microsoft.Private.Winforms)
- Microsoft.NETCore.App - 3.0.0-preview8-27912-03 (parent: Microsoft.Private.Winforms)
- Microsoft.NETCore.App - 3.0.0-preview8-27912-03 (parent: Microsoft.Private.Winforms)

eng/Version.Details.xml

 <?xml version="1.0" encoding="utf-8"?>
 <Dependencies>
   <ProductDependencies>
-    <Dependency Name="Microsoft.Private.Winforms" Version="4.8.0-preview8.19362.5">
+    <Dependency Name="Microsoft.Private.Winforms" Version="4.8.0-preview8.19362.4">
       <Uri>https://github.com/dotnet/winforms</Uri>
-      <Sha>7390ea96fe8ed63ce4a1353f3ddc359f6203658e</Sha>
+      <Sha>f0907ad904268482d1463f610786fad9a236e62e</Sha>
     </Dependency>
   </ProductDependencies>
   <ToolsetDependencies>
@@ -59,9 +59,9 @@
       <Uri>https://github.com/dotnet/corefx</Uri>
       <Sha>e519628accc31bd3d5f0a3bc5f937a2ec1dd55d1</Sha>
     </Dependency>
-    <Dependency Name="Microsoft.NETCore.App" Version="3.0.0-preview8-27912-04" CoherentParentDependency="Microsoft.Private.Winforms">
+    <Dependency Name="Microsoft.NETCore.App" Version="3.0.0-preview8-27912-03" CoherentParentDependency="Microsoft.Private.Winforms">
       <Uri>https://github.com/dotnet/core-setup</Uri>
-      <Sha>ca870065b77a47c1106fafa4788c215651d6e31d</Sha>
+      <Sha>24699092bfcfc2a5f13e6b9f5a4046fdd45ca047</Sha>
     </Dependency>
     <Dependency Name="Microsoft.DotNet.Arcade.Sdk" Version="1.0.0-beta.19361.7">
       <Uri>https://github.com/dotnet/arcade</Uri>

eng/Versions.props

@@ -8,7 +8,7 @@
   </PropertyGroup>
   <!-- NuGet Package Versions -->
   <PropertyGroup>
-    <MicrosoftPrivateWinformsVersion>4.8.0-preview8.19362.5</MicrosoftPrivateWinformsVersion>
+    <MicrosoftPrivateWinformsVersion>4.8.0-preview8.19362.4</MicrosoftPrivateWinformsVersion>
   </PropertyGroup>
   <!-- Packages that come from https://github.com/dotnet/coreclr -->
   <PropertyGroup>
@@ -18,7 +18,7 @@
   </PropertyGroup>
   <!-- Packages that come from https://github.com/dotnet/core-setup -->
   <PropertyGroup>
-    <MicrosoftNETCoreAppVersion>3.0.0-preview8-27912-04</MicrosoftNETCoreAppVersion>
+    <MicrosoftNETCoreAppVersion>3.0.0-preview8-27912-03</MicrosoftNETCoreAppVersion>
     <MicrosoftNETCorePlatformsVersion>3.0.0-preview8.19361.13</MicrosoftNETCorePlatformsVersion>
     <SystemDrawingCommonVersion>4.6.0-preview8.19361.13</SystemDrawingCommonVersion>
     <SystemDirectoryServicesVersion>4.6.0-preview8.19361.13</SystemDirectoryServicesVersion>